【作者】 陈志宏； 毛德宝； 左义成； 李惠民； 钟长汀； 相振群；

【Author】 CHEN Zhihong MAO Debao ZUOYicheng LI Huimin ZHONG Changting XIANG Zhenqun(Chinese Academy of Geological Science, Beijing 100084, China Tianjin Institute of Geology and Minerl Resources, Tianjin300170, China)

【机构】 中国地质科学院； 天津地质矿产研究所；

【摘要】 采用颗粒锆石U-Pb同位素年代学研究方法（TIMS）阐明河北省北部北岔沟门地区极具特色的中生代浅成侵入岩组合的形成时代及其成矿意义。研究表明,北岔沟门一带发育了包括闪长玢岩、石英二长斑岩、角闪黑云二长岩、花岗闪长斑岩等在内的具浅成岩浆侵入作用特征的侵入岩共生组合,其中石英二长斑岩、角闪黑云二长岩、花岗闪长斑岩的TIMS锆石U-Pb同位素年龄分别为147.6±1.6Ma、146.2±₁.4Ma、146.2±3.9Ma,代表了其侵位成岩时代,该侵入岩石组合与北岔沟门含金银多金属矿床的形成具有密切的时、空、成因联系,构成了华北陆块北缘地区中生代典型的浅成岩浆侵入作用成矿系统。更多还原

【Abstract】 TIMS U-Pb ages are presented for the distinctive Mesozoic hypabyssal intrusions occurred inBeichagoumen area in northern region of Hebei province, and the metallogenetic significances of these intrusive rocks are also discussed here. These Mesozoic hypabyssal intrusions consist of dioritic porphyrite, monzonitic porphyry, amphibole biotite monzonite and granodiorite porphyry, and the latter three intrusive rocks among which yield TIMS U-Pb ages of 147.6±1.6Ma% 146.2±1.4Ma and 146.2±3.9Ma, respectively, representing the forming ages of them. The formation of Beichagoumen gold, silver-bearing polymetal ore deposit is closely related to the development of these hypabyssal intrusions in time, space and genesis, which comprises the typical metallogenetic system of Mesozoic hypabyssal intrusive magmatism in northern margin of North China platform.更多还原